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CN-122010307-A - Anti-blocking subsurface flow constructed wetland equipment

CN122010307ACN 122010307 ACN122010307 ACN 122010307ACN-122010307-A

Abstract

The invention relates to the technical field of artificial wetlands, in particular to anti-blocking subsurface flow artificial wetland equipment. The device comprises a shell, wherein a water inlet channel is formed in one end of the shell, a water outlet is formed in the other end of the shell, an overflow layer, a flow fixing layer and a flow guiding layer are sequentially arranged in the middle of the shell from top to bottom, overflow holes are formed in the two sides of the shell in an equidistant array mode, three plant belts with the upper ends penetrating through the overflow layer are sequentially planted in the flow fixing layer along the long side of the shell, a sedimentation bucket is arranged at the lower end of the water inlet channel, the middle of the sedimentation bucket is communicated with the overflow layer, a water distribution pipe which obliquely penetrates through the flow guiding layer is communicated with the lower portion of the sedimentation bucket, return pipes are communicated with the two sides of the water distribution pipe in an equidistant array mode, through holes are formed in the return pipes, broken stones wrapping the water distribution pipe and the return pipes are filled in the flow guiding layer, and impurities flow back to the sedimentation bucket through the return pipes and the water distribution pipes after the water passes through the three-layer structures from top to bottom. The device solves the problem of blockage of the subsurface constructed wetland from the source through layered cooperation, directional diversion and closed-loop mud discharge design, and is suitable for decentralized sewage treatment.

Inventors

  • HUANG XIHONG
  • Zhu Shini
  • YIN DEYU
  • TANG MEIFANG
  • CHEN XUELAN
  • PAN YU
  • LI YANG

Assignees

  • 日照市环境保护科学研究所有限公司

Dates

Publication Date
20260512
Application Date
20260313

Claims (10)

  1. 1. An anti-clogging subsurface flow constructed wetland device, comprising: the device comprises a shell (1), wherein one end of the shell (1) is provided with a water inlet channel (2), the other end of the shell is provided with a water outlet (23), the middle part of the shell (1) is sequentially provided with an overflow layer (9) for blocking impurities and draining waterlogging, a steady-flow permeable solid flow layer (16) and a water-collecting and flow-guiding flow guiding layer (20), two sides of the shell (1) are respectively provided with overflow holes (14) at equal intervals, and three plant belts (17) with the upper ends penetrating through the overflow layer (9) are sequentially planted on the solid flow layer (16) along the long side direction; The lower end of the water inlet channel (2) is provided with a sedimentation bucket (4), the middle part of the sedimentation bucket (4) is communicated with an overflow layer (9), the lower part of the sedimentation bucket (4) is communicated with a water distribution pipe (7) which is obliquely arranged and penetrates through a diversion layer (20), and two sides of the water distribution pipe (7) are respectively communicated with a water return pipe (8) provided with perforations at equal intervals; The water diversion layer (20) is filled with crushed stone for wrapping the water distribution pipe (7) and the water return pipe (8), and after the water body sequentially passes through the overflow layer (9), the solid flow layer (16) and the water diversion layer (20) from top to bottom, impurities in the water body sequentially flow back to the sedimentation hopper (4) through the water return pipe (8) and the water distribution pipe (7).
  2. 2. The anti-blocking subsurface flow constructed wetland equipment according to claim 1, wherein two sludge pumps (6) are arranged at one end of the shell (1) close to the water inlet channel (2), and the input ends of the two sludge pumps (6) are respectively communicated with the lower part of the sedimentation bucket (4).
  3. 3. The anti-blocking subsurface flow constructed wetland equipment according to claim 1, wherein a drainage plate (3) is arranged at the lower end of the water inlet channel (2), the upper part of the drainage plate (3) is obliquely arranged, the upper part of the drainage plate (3) covers the communication port between the sedimentation bucket (4) and the solid flow layer (16), and the sewage injected from the upper end of the sedimentation bucket (4) is prevented from directly flowing into the solid flow layer (16).
  4. 4. The anti-blocking subsurface flow constructed wetland equipment according to claim 3, wherein a flow stopping cover (5) is arranged at one side of the lower part of the sedimentation bucket (4) far away from the water distribution pipe (7), and the flow stopping cover (5) and the water return pipe (8) are coaxially arranged; The upper end of the flow stopping cover (5) is hinged with the sedimentation bucket (4) through a torsion spring, and the flow stopping cover (5) deflects to one side far away from the water distribution pipe (7) when being impacted by water flow.
  5. 5. A subsurface flow constructed wetland device for preventing blocking according to claim 3, wherein a hole plate (10) is arranged beside the water inlet channel (2), the hole plate (10) is fixedly connected with the inner wall of the shell (1), and the hole plate (10) is provided with through holes for plants of three plant belts (17) to pass through along the long side direction.
  6. 6. The anti-blocking subsurface flow constructed wetland equipment according to claim 5, wherein an overflow plate (13) is slidably arranged at one side of the overflow hole (14) close to the hole plate (10); The middle part of the overflow plate (13) is fixedly connected with a plastic hollow pipe (15), and water overflowed to the upper end of the hole plate (10) pushes the plastic hollow pipe (15) to move upwards.
  7. 7. The anti-blocking subsurface flow constructed wetland equipment according to claim 6, wherein an overflow disc (11) is arranged at the upper end of the hole plate (10) close to the water inlet channel (2), guide pins (12) are arranged on the overflow disc (11) in an array with equal angles along the circumferential direction, and the guide pins (12) are fixedly connected with the hole plate (10); The guide pin (12) is coaxially sleeved with a spring, the upper end of the spring is fixedly connected with the upper end of the guide pin (12), and the lower end of the spring is fixedly connected with the upper end of the overflow disc (11).
  8. 8. The anti-blocking subsurface flow constructed wetland equipment according to claim 7, wherein three planting pots (18) are arranged at the lower end of the hole plate (10) along the long-side direction in an array manner, and connecting holes (19) are formed at the lower end of each planting pot (18) in an equally-spaced array manner.
  9. 9. The anti-blocking subsurface flow constructed wetland equipment according to claim 8, wherein a keel plate (22) is arranged at the lower end of the planting pot (18), the keel plate (22) is fixedly connected with the shell (1), an anti-seepage film (21) is arranged at the upper end of the keel plate (22), and the anti-seepage film (21) is propped against the lower end of the planting pot (18).
  10. 10. The anti-blocking subsurface flow constructed wetland equipment according to claim 1, wherein a filter screen (24) is arranged on one side of the water outlet (23) close to the planting pot (18), and the filter screen (24) intercepts impurities in the water body.

Description

Anti-blocking subsurface flow constructed wetland equipment Technical Field The invention relates to the technical field of artificial wetlands, in particular to anti-blocking subsurface flow artificial wetland equipment. Background The subsurface constructed wetland has the advantages of ecological friendliness, low operation and maintenance cost and comprehensive purification effect, becomes an important process for treating urban domestic sewage, rural distributed sewage and industrial mild wastewater, and is widely applied to the field of water environment treatment. However, the core structure and the water flow regulation design have congenital defects, the blockage problem frequently occurs in actual operation, the purification efficiency is rapidly attenuated along with the operation time, the fault-free operation period of equipment is greatly shortened, the operation and maintenance cost of dredging and matrix replacement is increased, and the defect of restricting the large-scale and long-acting application of the subsurface constructed wetland is formed. The design of the water inflow pretreatment link of the existing subsurface flow constructed wetland is extensive, and the existing subsurface flow constructed wetland is not provided with accurate diversion and interception structures, so that the sludge and large-particle suspended impurities in the sewage can easily directly enter the foundation layer of the wetland, and the hidden danger of siltation is buried from the source. Meanwhile, the water distribution system is lack of uniform distribution design, so that the problems of local water flow rapidness and local water flow stagnation are easy to occur, under the premise, the water flow rapidness can wash the matrix to cause filler loss, and the water flow stagnation is easy to form an anaerobic environment, so that microbial films overgrow and adhere to the surfaces of pores of the matrix to gradually cause matrix hardening and block water flow permeation channels. In addition, the bottom layer water collection flow guide structure of the existing equipment is not provided with a matching design of directional mud discharge, small particle impurities carried in the sewage infiltration process are easy to accumulate in the bottom layer and can not be effectively collected and discharged, a plate junction layer is formed for a long time, further blocking is further aggravated, a part of the flow guide pipe is arranged, the condition that broken stone blocks the perforation of the pipe is easy to occur due to poor particle diameter adaptability of the pipe and the bottom layer filling material, the flow guide pipe is not provided with accurate power and structure guidance, the directional backflow collection of the impurities can not be realized, and the flow guide pipe becomes a new accumulation point. In addition, the existing subsurface flow constructed wetland is lack of diversion and liquid level adaptation design, so that the problem of water flow short circuit is easy to occur, part of sewage is not fully contacted with plant roots and matrixes, namely, the sewage is discharged quickly, the purification efficiency is greatly reduced, meanwhile, a sedimentation bucket is not smoothly connected with a diversion structure, no anti-countercurrent design is adopted, collected impurities are easy to flow back to a diversion layer, a sludge discharge system is mostly of a rough design, sludge discharge is not thorough, the constructed wetland equipment is required to be excavated and cleaned after blockage, the operation and maintenance difficulty is high, and the overall operation stability of the equipment is seriously affected. Therefore, the design of a subsurface flow constructed wetland device capable of solving the blockage problem from the source is an urgent need in the industry. Disclosure of Invention Based on the above, it is necessary to provide an anti-blocking subsurface flow constructed wetland device aiming at the problems in the prior art. In order to solve the problems in the prior art, the invention adopts the following technical scheme: An anti-clogging subsurface flow constructed wetland device comprising: The device comprises a shell, wherein one end of the shell is provided with a water inlet canal, the other end of the shell is provided with a water outlet, the middle part of the shell is sequentially provided with an overflow layer for blocking impurities and draining water, a steady flow permeable solid flow layer and a water collecting and guiding flow layer, two sides of the shell are respectively provided with overflow holes for draining water at equal intervals in an array manner, and three plant belts with upper ends penetrating through the overflow layer are sequentially planted on the solid flow layer along the long side direction; the lower end of the water inlet channel is provided with a sedimentation bucket for collecting silt, the middle part of the se